Finding the Third Proportional to 3,920,649 and 8,492,891

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,649 : 8,492,891 = 8,492,891 : x
2. Step 2: Convert to fraction form
   3,920,649/8,492,891 = 8,492,891/x
3. Step 3: Cross multiply
   3,920,649x = 8,492,891 × 8,492,891
4. Step 4: Simplify right side
   3,920,649x = 72,129,197,537,881
5. Step 5: Solve for x
   x = 72,129,197,537,881/3,920,649
6. Step 6: Final answer
   x = 18,397,259.62